# How do you simplify each expression using positive exponents (a^4 b^-3)/(ab^-2)?

$\frac{{a}^{3}}{b}$
$\frac{{a}^{4} {b}^{- 3}}{a {b}^{- 2}} = \frac{{a}^{4} {b}^{2}}{a {b}^{3}} = \frac{{a}^{3}}{b}$
Since ${a}^{- x} = \frac{1}{{a}^{x}}$.